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Commit | Line | Data |
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05149ed5 AM |
1 | #!/bin/sh |
2 | # | |
3 | # start_udev | |
4 | # | |
5 | # script to initialize /dev by using udev. | |
6 | # | |
7 | # Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> | |
8 | # | |
9 | # Released under the GPL v2 only. | |
10 | # | |
7e0b6014 | 11 | # This needs to be run at the earliest possible point in the boot |
05149ed5 AM |
12 | # process. |
13 | # | |
14 | # Based on the udev init.d script | |
15 | # | |
7e0b6014 | 16 | # Thanks go out to the Gentoo developers for proving |
05149ed5 AM |
17 | # that this is possible to do. |
18 | # | |
19 | # Yes, it's very verbose, feel free to turn off all of the echo calls, | |
20 | # they were there to make me feel better that everything was working | |
21 | # properly during development... | |
940e3565 ER |
22 | |
23 | # default value, if no config present. | |
12bbae40 | 24 | udev_root="/dev" |
b44e0a3d | 25 | sysfs_dir="/sys" |
d35df3ca | 26 | udevd_timeout=8 |
940e3565 | 27 | |
05149ed5 | 28 | # don't use udev if sysfs is not mounted. |
dda87135 | 29 | [ -d $sysfs_dir/class ] || exit 1 |
05149ed5 | 30 | [ -r /proc/mounts ] || exit 1 |
05149ed5 AM |
31 | [ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf |
32 | ||
401263e1 | 33 | . /etc/rc.d/init.d/functions |
05149ed5 AM |
34 | |
35 | prog=udev | |
05149ed5 | 36 | bin=/sbin/udev |
ab4c8ae1 | 37 | udevd=/lib/udev/udevd |
0d3aa7d6 ER |
38 | # trim traling slash, code expects it not to be there |
39 | udev_root=${udev_root%/} | |
05149ed5 AM |
40 | |
41 | make_extra_nodes () { | |
ba060a4b | 42 | grep '^[^#]' /etc/udev/links.conf | \ |
43 | while read type name arg1; do | |
7e0b6014 ER |
44 | [ "$type" -a "$name" -a ! -e "$udev_root/$name" -a ! -L "/dev/$name" ] ||continue |
45 | case "$type" in | |
46 | L) ln -s $arg1 $udev_root/$name ;; | |
47 | D) mkdir -p $udev_root/$name ;; | |
48 | M) mknod -m 600 /dev/$name $arg1 ;; | |
49 | *) echo "links.conf: unparseable line ($type $name $arg1)" ;; | |
50 | esac | |
ba060a4b | 51 | done |
584c4247 AM |
52 | [ -d /lib/udev/devices ] && cp -a /lib/udev/devices/* /dev/ >/dev/null 2>&1 || : |
53 | [ -d /lib64/udev/devices ] && cp -a /lib64/udev/devices/* /dev/ >/dev/null 2>&1 || : | |
05149ed5 AM |
54 | } |
55 | ||
d8394a8d AM |
56 | kill_udevd() { |
57 | if [ -x /sbin/pidof ]; then | |
7e0b6014 | 58 | pid=$(/sbin/pidof -x udevd) |
d8394a8d AM |
59 | [ -n "$pid" ] && kill $pid |
60 | fi | |
61 | } | |
62 | ||
294ac9d6 | 63 | set_hotplug_handler() { |
7e0b6014 | 64 | echo "" > /proc/sys/kernel/hotplug |
294ac9d6 | 65 | } |
15874c6e | 66 | |
bdd7aa53 ER |
67 | # find subdirs mounted under $udev_root |
68 | get_dev_mounts() { | |
69 | awk -vudev_root="$udev_root/" ' | |
70 | BEGIN { | |
71 | len = length(udev_root); | |
72 | } | |
73 | ||
74 | substr($2, 1, len) == udev_root { | |
75 | print substr($2, len + 1) | |
76 | }' /proc/mounts | |
77 | } | |
78 | ||
05149ed5 | 79 | export ACTION=add |
6ba94d68 AM |
80 | prog=udev |
81 | ret=0 | |
90d90678 AM |
82 | show "Starting udev" |
83 | busy | |
294ac9d6 | 84 | |
12bbae40 ER |
85 | # mount the devtmpfs on $udev_root, if not already done |
86 | awk "\$2 == \"$udev_root\" && \$3 == \"devtmpfs\" { exit 1 }" /proc/mounts && { | |
3397b77e ER |
87 | submounts=$(get_dev_mounts) |
88 | ||
89 | if [ "$submounts" ]; then | |
90 | # mount to temporary location to be able to move submounts | |
91 | # this needs writable TMPDIR:-/tmp, so it won't work in early boot | |
92 | # but fix is simple: use initramfs instead of romfs | |
93 | devdir=$(mktemp -d ${TMPDIR:-/tmp}/tmpXXXXXX) | |
94 | else | |
95 | devdir=$udev_root | |
96 | fi | |
bdd7aa53 ER |
97 | mount -n -o mode=0755 -t devtmpfs devtmpfs "$devdir" |
98 | ret=$(( $ret + $? )) | |
7e0b6014 | 99 | |
bdd7aa53 | 100 | # relocate submounts |
3397b77e | 101 | for dir in $submounts; do |
bdd7aa53 ER |
102 | mount -n --move $udev_root/$dir $devdir/$dir |
103 | ret=$(( $ret + $? )) | |
104 | done | |
0d219f5b | 105 | |
3397b77e ER |
106 | if [ "$submounts" ]; then |
107 | mount -n --move $devdir $udev_root | |
108 | rmdir $devdir | |
109 | fi | |
6ba94d68 | 110 | } |
120a2def | 111 | |
120a2def | 112 | kill_udevd > "$udev_root/null" 2>&1 |
ec7c0939 | 113 | |
7e0b6014 ER |
114 | # Start udevd daemon |
115 | $udevd --daemon | |
116 | ret=$(( $ret + $? )) | |
117 | ||
118 | # Making extra nodes | |
119 | make_extra_nodes | |
120 | ret=$(( $ret + $? )) | |
855c97b3 | 121 | |
7e0b6014 ER |
122 | if [ -f "/sys/class/tty/console/uevent" ]; then |
123 | # Setting default hotplug handler | |
855c97b3 | 124 | set_hotplug_handler |
125 | ret=$(( $ret + $? )) | |
126 | ||
d95b8af3 | 127 | # retrigger all events |
7e0b6014 | 128 | # Udev finds it's own way of making this dir |
c5ffe681 | 129 | # and making it by hand makes udevsettle |
130 | # work forever | |
131 | #mkdir -p /dev/.udev/queue | |
7e0b6014 | 132 | udevadm trigger |
15874c6e | 133 | ret=$(( $ret + $? )) |
7e0b6014 | 134 | |
d95b8af3 | 135 | # wait for the events to finish |
7e0b6014 | 136 | udevadm settle |
15874c6e | 137 | ret=$(( $ret + $? )) |
de6b464e | 138 | else |
855c97b3 | 139 | echo "Kernel too old for this udev version" |
de6b464e | 140 | fi |
d95b8af3 | 141 | |
120a2def | 142 | ret=$(( $ret + $? )) |
6ba94d68 | 143 | [ $ret -eq 0 ] && ok || fail |
05149ed5 | 144 | exit 0 |